Jdk 15: The New Features In Java 15 May 2026

💡 JDK 15 made Java more readable with Text Blocks and more efficient with the finalization of the ZGC and Shenandoah garbage collectors.

JDK 15 was released in September 2020 as a short-term feature release. It focused on finalizing major syntax enhancements and improving JVM performance. 🚀 Top Production Features

Sealed classes and interfaces restrict which other classes may extend or implement them. Provides better control over inheritance. Useful for domain modeling and pattern matching. Syntax: public sealed class Shape permits Circle, Square {} Text Blocks (Finalized) Multiline string literals are now standard. Eliminates the need for most escape sequences. Automatically manages indentation. Uses triple quotes: """ ... """ . EdDSA (Edwards-Curve Digital Signature Algorithm) JDK 15: The new features in Java 15

Allows Java programs to safely and efficiently access arbitrary memory outside of the Java heap. Found in jdk.incubator.foreign . 🧹 Deprecations and Removals Completely removed. RMI Activation: Deprecated for future removal. Solaris and SPARC Ports: Support officially removed. Biased Locking: Disabled by default and deprecated.

Reduces pause times by performing evacuation work concurrently. Hidden Classes 💡 JDK 15 made Java more readable with

A new platform-independent implementation of the EdDSA signature scheme. Higher security and performance. Found in the java.security package. 🛠️ JVM and Tooling Improvements ZGC and Shenandoah (Finalized)

These features graduated from "preview" or "experimental" status to being permanent parts of the language. Sealed Classes (First Preview) 🚀 Top Production Features Sealed classes and interfaces

Both low-latency Garbage Collectors are now production-ready. Scalable, low-latency (sub-millisecond) GC.